Dust separator



Dec. 23, 1930. A JORDAHL I 1,786,208`

DU'sT sEPARA'roR Original Filed Dec. 19, 1924 INVENTOR.

A TTORNEY.

Petenred Dee. z3, i930 UNITED STATES PATENT omer.

ANDERS JORDAHL,

OF NEW YORK; N. Y., ASSIGNOB TO AMERICAN .AIR FILTER COI- PANY, INC., F LOUISVILLE, KENTUCKY,

A CORPORATION OF DELAWARE DUST SEPABATOB Original application llled December 19, November 8, 1927.

The present invention relates to an air and gas filter of the type in which the filter medium is'self-'cleaning so that the apparatus can operate continuously without the necessity of interruptions for the purpose of removing the dust and dirt which has ac` cumulated in the filter medium. This application is a division of application Serial o. 757,014 filed December` 19, 1924. It

is an .object of this invention to intermitl tently or .continuously subject sections of the filter medium automatically to the cleaning action of a suitable viscous liquid or viscous which not only has the effect of cleaning the filter ter medium with a coating of viscous or other suitable liquid so that the eiiciency of the filter is greatly increased. It is a further object ofV this invention to provide a means such as bailles, eliminator plates or suitable screens, depending upon the capacity and service required, in the installation which are adapted to separate and retain any particles of viscous` liquid which may have been carried along by the air or gas after such air has been Adrawn `or forced through the filter medium since it has been found in actual practice that small particles of the viscous fluid are carried away in suspension with the cleaned air or gas which is objectional. invention is to provide a means whereby a. viscous fluid is continuously applied'to the filter medium which medium is preferably arranged around'or forms the periphery of a rotatable drum. A further object is to provide means for rotating the drum which may be accomplished by hand orby mechani- ,-cal meanseither intermittently or continu;

"flously, depending upon the speciiic service required. It is also an object of this invention to construct the filter so that it forms an airtight connection between itself and the v 4;, casing in which it revolves and into which it but also provides the ilvto which a screen 46 is secured.

A still further object of this.

-dicated in Fig. 1

i924, serial 110.757,014. inviaea and une application mea serial Ne. 231,952.

is constructedy so that the air will pass through the filter medium and notaround it.

Further objects will be apparent from the following specification taken in connectionv with the accompanying drawings in which like reference characters indicate-corresponding parts throughout and in which:

Fig. 1 is a vertical cross sectional view of a dust se arator,

Fig. 2 1s al longitudinal section of the separator and Fig. 3 is a plan view showing an operator for the separator. 1

This separator is adapted to be used in connection with the air intake of a carburetor for an internal combustion engine or'it may be'used in connection with compressors or other air pumps. It consists of a casing 38 having a to piece 39 secured thereon to which is suitab y secured a screen 40. A rotatable drum 41 is arranged on a shaft 42, said shaft being preferably square in cross-secl-v tion so that it may rot-ate the drum and is provided with a nut 43 by which the shaftv may be retained in said casing. The drum comprises a side disk 44 and an open side disk 45 A cylindrical perforated plate 67 is secured on the edges of the disks, as shown, and the filter 70 is suitably secured on said plate, said filter being adapted to comprise any suitable material but is shown as consisting of two screens between i which a fibrous material is inserted. Asinthe filter forms an airtight joint 47 between itself and the casing 38 so that all'of the air drawn through the screen must pass through the iilter and into the interior of drum 41. The air which asses f through the' filter into the drum is orced through the screen 46 and then through the outlet 48, the screen 46 being for the purpose of removing any particles of viscous liquid which may vbe present in sus ension in the air due to the passa e of the air through the saturated ilter. T e viscous liquid 1s apoo particles such as parts of the filter lof the fact that the drum rotates in a plied and the filter is also cleaned by means quantity of viscous liquid which is located in the bottom of the casing. This amount of v1scous liquid can comprise any suitable quantity but it should preferably be enough to Just reach the lower part of the perforated plate 67. The accumulated dirt as Well as the dirty viscous liquid can be withdrawn from the casing by means of a screw-threaded cap. 49 which is located at the lowermost portion of the casing and preferably on an extens ion 50.

Motion ma be imparted to the drum 41 by any suita le means but for an internal combustion engine for an automobile, advantage is taken of the steering rod 51 associated with the front wheels 52. For this purpose a ratchet wheel 53 is suitably mounted on the axle beam 54 and on the rod 51 is secured a pawl 55 which is adapted to engage the teeth of Wheel 53. A flexible tube 56 connects the ratchet Wheel with the filter device and said tube encloses a chain or other suitable transmission device 57 for conveying the motion of the ratchet Wheel to the drum 41. It is thus seen that a motion to the left by the rod 51 in steering the automobile will rotate the ratchet 53 by the engagement therewith of the pawl 55 so that the drum Will be given a slight turn. By means of this intermittent motion of the drum the filter Will be advantageously cleaned as Well as constantly coated wit-h the viscous liquid;

As stated in the foregoing the apparatus can be rotated continuously or intermittently depending upon the output of cleaned air required, and the viscous liquid Will not only coat the filter but will also clean it'. All of the particles of viscous liquid and also any medium which may become detached will also ffy against the screen 46 and be retained thereby but will slowly flow or fall to the bottom.

I claim as my invention:

1. A dust separator for air or gases comprising a casing having a liquid in its lower portion; a rotatable drum mounted in said casing and having a filter mounted thereon in gas tight contact with the Walls of the casing to prevent leakage of the gas around the filter; an inlet and an outlet in said casing forthe gases which pass through the filter; means for rotating said drum in order to coat said filter with said liquid; and means for separating, from the gases which have passed through the filter, particles of the liquid carried in suspension with the gases.

2. A dust separator for air or gases comprising a casing having a liquid in its lower the air; a rotatable drum mounted in said casing and having a filter mounted thereon in gas-tight contact with and which is adapted the walls ofthe casing to pass through sai liquid, the gas being adapted to pass through the filter and the gas tight contact preventing leakage of gas around the filter; means for. rotating said drum to progressively coat said filter with said liquid; and means for separating, from the gases which have passed through the filter, particles of the liquid carried in suspension With the gases.

3. A dust separator for air or gases comprising a casing having a liquid in its lower portion and an inlet and an outlet for the air; a rotatable filter drum mounted in gas-tight contact relative to the end Walls of said casing and being adapted to pass through sai'l liquid, the gas being adapted to pass through the filter and the gas tight contact preventing leakage of gas around the filter; means vfor intermittently rotating said drum and means for separating, from the gases Which have passed through the filter, particles of the liquid carried in suspension with the gases.

4. A dust separator for air or gases comprising a casing having a liquid in its lower portion and an inlet and an outlet for the air; a rotatable filter drum mounted in gas-tight contact relative to the end walls of said casing and being adapted uid, the gas being adapted to pass through the filter and the gas tight Contact preventing leakage of gas around the filter; means for rotating said drum; and a screen for separating, from the gases which have passed through the filter, particles of the liquid carried in suspension With the gases.

5. A dust separator for air or gases comprising a casing having a liquid inits lower portion and an inlet and an outlet for the air; a rotatable filter drum mounted in gas-tight contact relative to the end Walls of said casing and being adapted to pass through said liquid, the gas being adapted to pass through the filter and the gas tight contact preventing leakage of gas around the filter; means for rotating said drum; and a screen mounted on said rotatable filter drum for separating, from the gases Which have passed through the filter, particles of the liquid carried in suspension With the gases.

6. A dust` separator for air or gases comprising a casing having a liquid in its lower portion and an inlet and an outlet for the air; a rotatable filter drum mounted in gastight contact relative to the end walls of said casing and being adapted to pass through said liquid, the gas being adapted to pass through the filterand the gas tight Contact preventing leakage of gas around the filter; a ratchet and paWl mechanism for intermittently rotating said drum; and a screen mounted on rom the gases which have passed through the filter, particles of the liquid carried inl suspension with the gases.

A dust separator for air and gases, coinprising a casing adapted to contain a liquid to pass through said liqsaid rotatable filter drum for separating, `portion and having an inlet and an outlet for f in its lower portion and an inlet and an outlet for the air; rotatable filter elements v mounted in said casing and adapted to pass through said liquid, said elements forming an air-tight joint with the end walls of said casing, and the gas being adapted to pass through the ilter and the gas tight contact preventing leakage of gas around the filter; a ratchet and pawl mechanism 'for rotating said filter elements; and a screen for separating, from the gases which have passed through the ilter, particles of the liquid carried in suspension with the ases.

In testimony whereof I a x my signature.

ANDERSJORDAHL. A l 

